Servicios Personalizados
Revista
Articulo
Indicadores
- Citado por SciELO
- Accesos
Links relacionados
- Similares en SciELO
Compartir
Agrociencia
versión On-line ISSN 2521-9766versión impresa ISSN 1405-3195
Resumen
SALAYA-DOMINGUEZ, José M.; LOPEZ-UPTON, Javier y VARGAS-HERNANDEZ, J. Jesús. Genetic and environment variation in two progeny tests of Pinus patula. Agrociencia [online]. 2012, vol.46, n.5, pp.519-534. ISSN 2521-9766.
Pinus patula Schiede ex Schltdl. et., Cham. is an endemic pine of México improved abroad because of its fast growth rate and should be evaluated to be reintroduced into the country. In this study the development of progenies with different breeding levels was compared in two trials in contrasting environments: Aquixtla, Puebla, at 2930 m (S1) and Acaxochitlán, Hidalgo, at 2260 m elevation (S2). Survival was evaluated at 6 years of age and at 5 and 6 years normal diameter (ND), total height (ALT), and stem volume (VOL) of 36 families improved in Colombia and South Africa (group M) and of 36 native families phenotypically selected (group S). At 6 years, survival was 72.7 % in S1 and 90 % in S2, with better growth in the latter site. There were significant differences (p≤ 0.05) between the two groups of families in all variables in both years. Progenies of the M group were higher in the volume of the trunk in S1 (4.3 vs. 3.6 dm3) but not in S2 (10.7 vs. 13.5 dm3). In S1, heritabilities (hi2) for growth traits ranged from 0.09 to 0.12 and in S2 from 0.26 to 0.35. Families of M Group had higher values of hi2 in S1 but in S2 values were similar. Genetic (rg) and phenotypic (rp) correlations between the growth variables for S1 and S2 ranged from 0.80 to 1.0 (≥ 0.80) at both ages. The genotypeX environment interaction (GX A) was high because the values of rB in both ages were lower than 0.70 and 0.0 in some cases. The group of M families had lower GX A interaction in all variables evaluated.
Palabras llave : Pinus patula; G X A; progenies; genetic parameters; reintroduction.